From 728f0eb2f5119eb45a760a6f2293521d4d8f2374 Mon Sep 17 00:00:00 2001
From: Vadim Pisarevsky <no@email>
Date: Wed, 10 Nov 2010 20:11:07 +0000
Subject: [PATCH] fixed infinite loop in FileStorage::open when reading
 incomplete XML's (ticket #663)

---
 modules/core/src/persistence.cpp | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/modules/core/src/persistence.cpp b/modules/core/src/persistence.cpp
index 79fd213d85..c2b5c59145 100644
--- a/modules/core/src/persistence.cpp
+++ b/modules/core/src/persistence.cpp
@@ -1763,7 +1763,7 @@ icvXMLParseValue( CvFileStorage* fs, char* ptr, CvFileNode* node,
 
         d = ptr[1];
 
-        if( c =='<' )
+        if( c =='<' || c == '\0' )
         {
             CvStringHashNode *key = 0, *key2 = 0;
             CvAttrList* list = 0;
@@ -1773,7 +1773,7 @@ icvXMLParseValue( CvFileStorage* fs, char* ptr, CvFileNode* node,
             const char* type_name = 0;
             int elem_type = CV_NODE_NONE;
 
-            if( d == '/' )
+            if( d == '/' || c == '\0' )
                 break;
 
             ptr = icvXMLParseTag( fs, ptr, &key, &list, &tag_type );
@@ -1989,6 +1989,9 @@ icvXMLParseTag( CvFileStorage* fs, char* ptr, CvStringHashNode** _tag,
     char c;
     int have_space;
 
+    if( *ptr == '\0' )
+        CV_PARSE_ERROR( "Preliminary end of the stream" );
+    
     if( *ptr != '<' )
         CV_PARSE_ERROR( "Tag should start with \'<\'" );